Risk Assessment and Toxicology: HCH Contaminated Site Cleanup Guidance August 23, 2011 - Toxicity Criterion for Alpha-HexachlorocyclohexaneAugust 23, 2011 - Toxicity Criterion for Beta-HexachlorocyclohexaneAugust 23, 2011 - Toxicity Criterion for Gamma-Hexachlorocyclohexane Back to Resource Search